CN116705532A - Tap change transition circuit for on-load tap-changer and on-load tap-changer - Google Patents
Tap change transition circuit for on-load tap-changer and on-load tap-changer Download PDFInfo
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- CN116705532A CN116705532A CN202211713729.4A CN202211713729A CN116705532A CN 116705532 A CN116705532 A CN 116705532A CN 202211713729 A CN202211713729 A CN 202211713729A CN 116705532 A CN116705532 A CN 116705532A
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- tap
- load
- changer
- transition
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- 230000007704 transition Effects 0.000 title claims abstract description 96
- 230000008859 change Effects 0.000 title claims abstract description 13
- 238000010079 rubber tapping Methods 0.000 claims description 65
- 230000007935 neutral effect Effects 0.000 claims description 36
- 230000009471 action Effects 0.000 claims description 25
- 238000010586 diagram Methods 0.000 description 10
- 238000004590 computer program Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 101100497221 Bacillus thuringiensis subsp. alesti cry1Ae gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000004804 winding Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0005—Tap change devices
- H01H9/0038—Tap change devices making use of vacuum switches
Abstract
The invention discloses a tap change transition circuit for an on-load tap changer and the on-load tap changer, and belongs to the technical field of on-load tap changers for transformers. The invention comprises the following steps: main contact M 1 Main contact M 2 Change-over switch T 1 Change-over switch T 2 Transitional vacuum interrupter V 1 Transitional vacuum interrupter V 2 And a transition resistance R. The invention solves the problems that in the prior art, a vacuum type on-load tap-changer is switched from an N tap-off side to an N+1 tap-off side and from the N+1 tap-off side to the N tap-off side, and the mechanical structure of a transition circuit is complex.
Description
Technical Field
The present invention relates to the technical field of on-load tap changers for transformers, and more particularly, to a tap-changing transition circuit for an on-load tap changer and an on-load tap changer.
Background
An on-load tap changer is a device that operates under the excitation or load conditions of a transformer to change the tapping position of windings. The vacuum on-load tap-changer commonly used at present is a combined type and consists of a change-over switch, a tap selector and an electric mechanism. The change-over switch is a switching device which is used together with a tapping selector and is used for carrying, switching on and off current in a selected circuit, and consists of a quick mechanism, a switching mechanism, a transition resistor and an oil chamber. The switching process of the diverter switch is a combined mechanical and electrical process that uses the principle of a transition circuit to complete the electrical connection of the tap change. The switching topology circuit is also diversified, and mainly the electric component structure of the transition circuit, the action sequence of each contact and the switching tasks born are inconsistent. The existing switching circuit has a plurality of tapping conversion transitional processes, so that the mechanical structure is complex.
Disclosure of Invention
In view of the above problems, the present invention provides a tap change transition circuit for an on-load tap changer, comprising: main contact M 1 Main contact M 2 Change-over switch T 1 Change-over switch T 2 Transitional vacuum interrupter V 1 Transitional vacuum interrupter V 2 And a transition resistance R;
the main contact M 1 Connecting the N-tap side of the vacuum on-load tap-changer with the neutral point of the transformer, and the main contact M 2 Connecting the N+1 tapping side of the vacuum on-load tapping switch with the neutral point of the transformer, the change-over switch T 1 One end and transition vacuum interrupter V 1 Transition resistor R and transition vacuum interrupter V 2 The other end is connected with the neutral point of the transformer, and the change-over switch T 2 One end and transition vacuum interrupter V 2 The N+1 tapping side of the vacuum on-load tapping switch is connected, the other end of the vacuum on-load tapping switch is connected with a neutral point of the transformer, and the transition vacuum interrupter V 1 Connected in parallel with the transition resistor R, and the other end is connected with the N tapping side of the vacuum on-load tapping switch and the transition vacuum interrupter V 2 Connection of said transition vacuum interrupter V 2 The load tap switch is connected with the N+1 tap side of the empty load tap switch, and the other end of the load tap switch is connected with the transition resistor R.
Optionally, the action time sequence of switching from the N tap side to the n+1 tap side of the vacuum type on-load tap-changer and the action time sequence of switching from the n+1 tap side to the N tap side of the vacuum type on-load tap-changer are symmetrical time sequences.
Optionally, when the gear of the vacuum on-load tap-changer is at the N tap side, the main contact M 1 Closing, main contact M 2 Switch T is opened 1 The movable contact of the action arm is connected with the N tapping side and the change-over switch T 2 The moving contact of the action arm is connected with a transition resistor R, and the transition vacuum interrupter V 1 Closing and transition vacuum interrupter V 2 And (5) disconnecting.
Optionally, when the gear of the vacuum on-load tap-changer is at the N-tap side, the load current I at the N-tap side N Via main contact M 1 And outputting to a neutral point of the transformer.
Optionally, when the gear of the vacuum on-load tap-changer is at the n+1 tap side, the main contact M 2 Closing, main contact M 1 Switch T is opened 2 The movable contact of the action arm is connected with the N+1 tapping side and the change-over switch T 1 Moving contact and transition electricity of action armResistor R and transitional vacuum interrupter V 1 Connection, transition vacuum interrupter V 1 Closing and transition vacuum interrupter V 2 And (5) disconnecting.
Optionally, when the gear of the vacuum on-load tap-changer is at the n+1 tap side, the load current I at the n+1 tap side N Via main contact M 2 And outputting to a neutral point of the transformer.
In still another aspect, the present invention further provides an on-load tap changer, where an N tap side and an n+1 tap side of the on-load tap changer are connected to a transformer neutral point through a tap change transition circuit.
Optionally, the on-load tap-changer is a vacuum on-load tap-changer.
Optionally, the action time sequence of switching from the N tap side to the n+1 tap side of the on-load tap switch and the action time sequence of switching from the n+1 tap side to the N tap side of the on-load tap switch are symmetrical time sequences.
Optionally, when the gear of the on-load tap-changer is at the N-tap side, the load current I at the N-tap side N Main contact M of transformed transition circuit 1 And outputting to a neutral point of the transformer.
Optionally, when the gear of the on-load tap-changer is at the n+1 tap side, the load current I at the n+1 tap side N Main contact M of transformed transition circuit 2 And outputting to a neutral point of the transformer.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a tapping conversion transition circuit for an on-load tapping switch, which comprises: main contact M 1 Main contact M 2 Change-over switch T 1 Change-over switch T 2 Transitional vacuum interrupter V 1 Transitional vacuum interrupter V 2 And a transition resistance R; the main contact M 1 Connecting the N-tap side of the vacuum on-load tap-changer with the neutral point of the transformer, and the main contact M 2 Connecting the N+1 tapping side of the vacuum on-load tapping switch with the neutral point of the transformer, the change-over switch T 1 One end and transition vacuum interrupter V 1 Transition resistor R and transition vacuum interrupter V 2 Connected at the other endIs connected with the neutral point of the transformer, and the change-over switch T 2 One end and transition vacuum interrupter V 2 The N+1 tapping side of the vacuum on-load tapping switch is connected, the other end of the vacuum on-load tapping switch is connected with a neutral point of the transformer, and the transition vacuum interrupter V 1 Connected in parallel with the transition resistor R, and the other end is connected with the N tapping side of the vacuum on-load tapping switch and the transition vacuum interrupter V 2 Connection of said transition vacuum interrupter V 2 The load tap switch is connected with the N+1 tap side of the empty load tap switch, and the other end of the load tap switch is connected with the transition resistor R. The invention solves the problem that in the prior art, the vacuum type on-load tap-changer is switched from an N tap side to an N+1 tap side and from the N+1 tap side to the N tap side, and the mechanical structure of a used transition circuit is complex.
Drawings
FIG. 1 is a circuit topology of a tap change transition circuit for an on-load tap changer according to the present invention;
FIGS. 2 (a) -2 (h) are tap change topologies for a tap change transition circuit of the present invention when switching from the N tap side to the N+1 tap side;
FIG. 3 is a topology diagram of the tap change transition circuit of the present invention on the n+1 tap side;
fig. 4 is a timing diagram illustrating a transition circuit of the tap changer according to the present invention from an N tap side to an n+1 tap side.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Example 1:
the invention provides a tapping conversion transition circuit for an on-load tapping switch, as shown in figure 1, comprising:
main contact M 1 Main contact M 2 Change-over switch T 1 Change-over switch T 2 Transitional vacuum interrupter V 1 Transitional vacuum interrupter V 2 And a transition resistance R;
wherein the main contact M 1 Connecting the N tapping side of the vacuum on-load tapping switch with a neutral point of the transformer;
main contact M 2 Connecting an N+1 tapping side of the vacuum on-load tapping switch with a neutral point of the transformer;
change-over switch T 1 The fixed end of the (B) is connected with the neutral point of the transformer, and the change-over switch T 1 The action arm of the vacuum on-load tap-changer is connected with a transition resistor R and a vacuum interrupter V on the N tap side of the vacuum on-load tap-changer 1 Optionally switching;
change-over switch T 2 The fixed end of the (B) is connected with the neutral point of the transformer, and the change-over switch T 2 The operating arm of (2) is arranged on the N+1 tapping side of the vacuum on-load tapping switch and is connected with the vacuum interrupter V 2 Optionally switching;
transitional vacuum interrupter V 1 Connecting transformer N tapping side and change-over switch T 1 The action end is connected with the transition resistor R in parallel; vacuum interrupter V 2 Connect transformer n+1 tapping side and change-over switch T 2 An action end;
one side of the transition resistor R is connected with a change-over switch T 1 The other side of the action end is connected with the main contact M 1 And T 1 And an action end.
The time sequence of switching from the N tapping side to the N+1 tapping side and the time sequence of switching from the N+1 tapping side to the N tapping side of the vacuum type on-load tapping switch are symmetrical time sequences.
The switching process and the current-cutting task of the vacuum on-load tap-changer are carried out by two transition vacuum interrupters V 1 、V 2 Bears the burden.
As shown in fig. 2, when the gear of the on-load tap-changer is in N tap, the main contact M 1 Closing, M 2 Switch T is opened 1 The moving contact of the action arm is connected with the N tapping switch T 2 The moving contact of the action arm is connected with a transition resistor, and the transition vacuum interrupter V 1 Closing and transition vacuum interrupter V 2 Open at this time N-tap side load current I N Via main switch M 1 And outputting to a neutral point of the transformer.
When the tap changer is switched from the N tap side to the n+1 tap side:
as shown in fig. 2 and 2a, the main contact M is opened 1 At this time, N-tap side load current I N Through transition vacuum interrupter V 1 Change-over switch T 1 Outputting to a neutral point of a transformer;
as shown in fig. 2 and 2b, the transitional vacuum interrupter V is opened 1 At this time, N-tap side load current I N Through the transition resistor R and the change-over switch T 1 Outputting to a neutral point of a transformer;
as shown in fig. 2 and 2c, the transitional vacuum interrupter V is closed 2 The transition circuit is connected with the N tapping side and the N+1 tapping side simultaneously to form bridging to generate a circulating current I C ＝U S R, the load current I N Transfer from the N tap side to the N+1 tap side, I N By transition of vacuum interrupter V 2 And change-over switch T 1 And outputting to a neutral point of the transformer.
Wherein the U is S Is the on-load tap-changer stage voltage;
as shown in fig. 2 and 2d, the transfer switch T is operated 2 An action end connected with the N+1 tapping side, wherein the load current I of the N+1 tapping side N Through the change-over switch T 2 And outputting to a neutral point of the transformer.
As shown in fig. 2 and 2e, the transfer switch T is operated 1 And the action end is disconnected with the transition resistor and the vacuum interrupter.
As shown in fig. 2 and 2f, the transitional vacuum interrupter V is opened 2 。
As shown in fig. 2 and 2g, a closed transition vacuum interrupterDevice V 1 。
As shown in fig. 2 and 2h, the main contact M is closed 2 Load current I N From the n+1 tap side of the transformer via the main contact M 2 And outputting to a neutral point of the transformer.
When the tap selector switches from the N tap to the n+1 tap, the transition circuit switching timing diagram is shown in fig. 3.
As shown in fig. 3, when the gear of the on-load tap-changer is in the n+1 tap, the main contact M 2 Closing, M 1 Switch T is opened 2 The moving contact of the action end is connected with the N+1 tapping side and the change-over switch T 1 Moving contact, transition resistor R and transition vacuum interrupter V 1 Connection, transition vacuum interrupter V 1 Closing and transition vacuum interrupter V 2 Open at this time, N+1 tap side load current I N Via main contact M 2 And outputting to a neutral point of the transformer.
When the tap selector switches from the N tap to the n+1 tap, the transition circuit switching timing diagram is shown in fig. 4.
The invention also provides an on-load tap-changer, wherein the N tap-changer side and the N+1 tap-changer side of the on-load tap-changer are connected with a neutral point of a transformer through a tap-changing transition circuit.
The on-load tap-changer is a vacuum on-load tap-changer.
The operation time sequence of switching from the N tapping side to the N+1 tapping side of the on-load tapping switch and the operation time sequence of switching from the N+1 tapping side to the N tapping side of the on-load tapping switch are symmetrical time sequences.
When the gear of the on-load tap-changer is at the N tap side, the load current I at the N tap side N Main contact M of transformed transition circuit 1 And outputting to a neutral point of the transformer.
When the gear of the on-load tap-changer is at the n+1 tap side, the load current I at the n+1 tap side N Main contact M of transformed transition circuit 2 And outputting to a neutral point of the transformer.
The invention solves the problems of asymmetric time sequence and complex mechanical structure of the change-over switch of the vacuum type on-load tapping switch in the prior art from an odd tapping to an even tapping and from the even tapping to the odd tapping.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The scheme in the embodiment of the invention can be realized by adopting various computer languages, such as object-oriented programming language Java, an transliteration script language JavaScript and the like.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (11)
1. A tap change transition circuit for an on-load tap changer, the tap change transition circuit comprising: main contact M 1 Main contact M 2 Change-over switch T 1 Change-over switch T 2 Transitional vacuum interrupter V 1 Transitional vacuum interrupter V 2 And a transition resistance R;
the main contact M 1 Connecting the N-tap side of the vacuum on-load tap-changer with the neutral point of the transformer, and the main contact M 2 Connecting the N+1 tapping side of the vacuum on-load tapping switch with the neutral point of the transformer, the change-over switch T 1 One end and transition vacuum interrupter V 1 Transition resistor R and transition vacuum interrupter V 2 The other end is connected with the neutral point of the transformer, and the change-over switch T 2 One end and transition vacuum interrupter V 2 The N+1 tapping side of the vacuum on-load tapping switch is connected, the other end of the vacuum on-load tapping switch is connected with a neutral point of the transformer, and the transition vacuum interrupter V 1 Connected in parallel with the transition resistor R, and the other end is connected with the N tapping side of the vacuum on-load tapping switch and the transition vacuum interrupter V 2 ConnectionSaid transition vacuum interrupter V 2 The load tap switch is connected with the N+1 tap side of the empty load tap switch, and the other end of the load tap switch is connected with the transition resistor R.
2. The tap changer transition circuit of claim 1, wherein the action sequence of switching the N tap side to the n+1 tap side of the vacuum type on-load tap changer and the action sequence of switching the n+1 tap side to the N tap side of the vacuum type on-load tap changer are symmetrical sequences.
3. The tap changing transition circuit of claim 1, wherein the main contact M is when the gear of the vacuum on-load tap changer is on the N-tap side 1 Closing, main contact M 2 Switch T is opened 1 The movable contact of the action arm is connected with the N tapping side and the change-over switch T 2 The moving contact of the action arm is connected with a transition resistor R, and the transition vacuum interrupter V 1 Closing and transition vacuum interrupter V 2 And (5) disconnecting.
4. The tap changing transition circuit of claim 3, wherein when the gear of the vacuum on-load tap changer is on the N-tap side, the load current I on the N-tap side N Via main contact M 1 And outputting to a neutral point of the transformer.
5. The tap changing transition circuit of claim 1, wherein the main contact M is when the gear of the vacuum on-load tap changer is on the n+1 tap side 2 Closing, main contact M 1 Switch T is opened 2 The movable contact of the action arm is connected with the N+1 tapping side and the change-over switch T 1 Moving contact of action arm, transition resistor R and transition vacuum interrupter V 1 Connection, transition vacuum interrupter V 1 Closing and transition vacuum interrupter V 2 And (5) disconnecting.
6. The tap changer transition circuit of claim 5, wherein the vacuum type on-load circuitWhen the gear of the tapping switch is positioned at the N+1 tapping side, the load current I of the N+1 tapping side N Via main contact M 2 And outputting to a neutral point of the transformer.
7. The on-load tap-changer is characterized in that an N tap-changer side and an N+1 tap-changer side are connected with a neutral point of a transformer through a tap-changing transition circuit.
8. The on-load tap-changer of claim 7, wherein the on-load tap-changer is a vacuum-type on-load tap-changer.
9. The on-load tap changer of claim 7, wherein the timing of the operation of switching the N-tap side to the n+1-tap side of the on-load tap changer and the timing of the operation of switching the n+1-tap side to the N-tap side of the on-load tap changer are symmetrical timings.
10. The on-load tap changer of claim 7, wherein when the gear of the on-load tap changer is on the N-tap side, the load current I on the N-tap side N Main contact M of transformed transition circuit 1 And outputting to a neutral point of the transformer.
11. The on-load tap-changer of claim 7, wherein the n+1 tap-side load current I is when the gear of the on-load tap-changer is on the n+1 tap-side N Main contact M of transformed transition circuit 2 And outputting to a neutral point of the transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211713729.4A CN116705532A (en) | 2022-12-29 | 2022-12-29 | Tap change transition circuit for on-load tap-changer and on-load tap-changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211713729.4A CN116705532A (en) | 2022-12-29 | 2022-12-29 | Tap change transition circuit for on-load tap-changer and on-load tap-changer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116705532A true CN116705532A (en) | 2023-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211713729.4A Pending CN116705532A (en) | 2022-12-29 | 2022-12-29 | Tap change transition circuit for on-load tap-changer and on-load tap-changer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116705532A (en) |
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2022
- 2022-12-29 CN CN202211713729.4A patent/CN116705532A/en active Pending
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